Automatic water cut-off



Patented July 29, 1924.

MACK P. WERHAN, F BENNINGTON, KANSAS.

AUTOMATIC WATER CUT-OFF.

Application filed March 21, 1921, Serial No. 453,918. Renewed June 3, 1924.

To all whom it may concern:

Be it known that I, MAoK P. VERHAN, citizen of the United States, residing at Bennington, in the county of Ottawa and State of Kansas, have invented certain new and useful Improvements in Automatic ater Cut-Offs, of which the following is a specification.

This invention relates, broadly, to an au h tomatic water out off especially adapted for use in connection with pumps that. feed water tanks, stock tanks, and the like.

The main and principal object of the invention is to provide an automatic water cut off adapted for use, as above described, and which, by reason of the novel and peculiar arrangement of means will, when the reserve pressure within the system falls below a predetermined degree, cut off the flow of water to the water tank, stock tank, or other receptacle being fed from the pump.

A further object of my invention is to provide a device. of the above character that is simple in construction, strong and durable and which may be used in connection with conventional forms of pumps and water tanks or stock tanks and connected therewith in a very short time.

Various other objects and advantages of my invention will become apparent during the continuance of the following description.

In the drawings Figure 1 is a view in elevation showing my invention as in its preferred embodiment. and as used in connection with a pump and a stock tank.

Figure 2 is a detailed view in vertical section of a cut off valve used in connection with my invention.

Figure 3 is another detailed view in vertical cross section of a pressure actuated means also used in connection with my invention.

In the drawings, indicates a pump and 11 indicates a stock tank. A discharge pipe 12 extends from the pump 10 and is connected by means of a coupling 13 and a pipe 14 to a three-way coupling 15. One end of the coupling 15 is connected to a nipple 16 which is in turn connected to a valve casing 17. Thevalve casing 17 is in turn connected to a nipple l8 and the nipple is connected by means of a pipe 19 and a coupling 20 to the stock tank 11.

Within the valve casing 17 is a transverse wall 21 inwhich is a central valve opening 22 of suitable size and consideration. A valve stem 23 passes through a stulling box 24 in one wall of the valve casing 17 and carries at its lower end, a valve 25. The valve stem extends through the valve opening 22 of the wall 21 so as to support the valve 25 belowthe opening as clearly shown in Figure 2.

A collar 26 is rigidly mountd on the nipple 16 and supports a standard 27 as shown in Figure 1. The standard 27 in turn forms a fulcrum for a lever 28 as at 29 so that the lever is free to rock thereon. At one end, the lever 28 is provided with an eye 30 that receives the valve stem 23. A pin 31 is pro vided on the valve stem 23 above the eye 30 to limit the upward movement of the eye with respect to the'valve stem so that when the lever 28 is properly moved the valve stem and the valve carried thereby may be lifted so as to bring the valve 25 into engagement with the valve opennig22 of the wall 21. Beneath. the eye 30, the valve stem carries a coil spring 32 and another pin 33 which serves to support the spring 32 as shown in Figure 2. From the above it will be observed that when the opposite end of.

the lever 28 is moved downwardly, the eye 30 will be raised and brought into engagement with the pin 31 of the valve stem so as to raise the valve stem and valve into a closed position. When pressure is released from the opposite end of the lever 28, the spring 82 will serve to return the valve to an open position.

The coupling 15 is also connected to a nipple 34 that in turn opens into a check valve 85. A nipple 36 connects the che k valve and a three-way coupling 37 while a pipe 38 connects the opposite end of the coupling 37 with a pressure tank 89. A cylinder 40 is carried by the other end of the coupling 87 and is adjustably, removably engaged therewith, and at its upper endis provided with a removable top 41 which has a central opening 42*for the purpose that will presently appear. A rod 43 passes through the opening 42 of the top 41 and extends into the cylinder 40 as shown in Figure 3 and carries, within the cylinder, spaced pistons 44 formed of leather or other suitable or desirable material which snugly engage the inner walls of the cylinder so as to be actuated by pressure entering the lower end of the cylinder. Between the pistons 44 and the removable top 41, the rod 43 is provided with an expansion spring 45 which normally tends to maintain the pistons 44 in their lowermost position within the cylinder From the above it will be observed that spring 32' will normally tend to maintain the valve in a closed position in connection with the valve opening 22 and that water passing through the pipes 12 and 14 enters the nipples 36 and 38 and the pressure tank 39 by way of the nipple 34 and the check valve 35. Now, when the pressure behind the check valve, that is within the nipples 36 and 38 and the pressure tank 39 increase,

the pistons 44 of the rod 43 will be actedupon and moved toward the top of the cylinder against the tension of the spring 45. This will in turn raise the rod, 43 so that the adjustable arm 46 carried thereby which is pivoted to the adjacent end of. the lever 28 will lift the adjacent end of the lever 28 thus lowering the other end of the lever which acting upon the spring 32 will cause the valve stem 23 to be moved downwardly so as to unseat the valve 25 and permit water to flow through the valve casing 17 by way of nipple 18 and pipe 19 to the stock tank 11. As the pressure decreases, however, the spring will tend to move the pistons 44 back to their normal position which will lower the rod 43 and cause a like movement of the arm 46 so that the lever 28 will be rocked upon its pivot 29 in such manner that the eye 30 will engage the pin 31 of the valve stem 23 and cause the valve stem to move the valve 25 into a closed position with respect to the valve opening 22.

From the foregoing it is believed that the advantages and novel features of my inveir tion will be readily understood and therefore further detailed'description is deemed un necessary.

hat is claimed is:

1. In a device of the character described the combination with a pump and a stock tank connected to the pump to receive water therefrom, of a cut off valve interposed between said pump and said stock tank and normally closing communication between the pump and the stock tank, a pressure tank, a check valve, means connecting said check valve and said pressure tank, means connecting said pump and said out OK valve,

means connecting said check valve and said last named means, means connecting said cut off valve and said stock tank, and pressure actuated means operable from a point intermediate said pressure tank and said check valve to open said out off valve upon the accumulation of a predetermined pressure within said pressure tank.

2. In a device of the character described the combination with a pump and a stock tank to receive water therefrom, of a cut off valve, means connecting said pump and said out off valve, means connecting said out off valve and said stock tank, a pressure tank, a check valve, means connecting said pressure tank and said check valve, means connecting said check valve and said first named means,

a lever rockably mounted on said first named.

means, means connecting one end of said lever and said cut off valve, and pressure actuated means arranged intermediate said check valve and said pressure tank connected with the other end of said lever adapted to open and close said cut off valve substantially as described.

3. An automatic water cut-ofi' comprising, in combination, a pump, a stock tank, a pipe line leading from the pump to the tank, a valve located in the said line and normally closing communication between the pump and the tank, a pressure tank having communication with the said pipe line at a.

point between the pump and the valve, and valve-actuating means connected with said valve, and operating upon the accumulation of a predetermined pressure within said pressure tank to open the said valve.

4. An automatic water cut-ofii comprising, in combination, a pump, a stock tank, a pipe line leading from the pump to the said tank, a cut-off valve located in said line and normally closing communication between the pump and the tank, a pressure tank having communication with the said pipe line at a point between the pump and the valve, and valve actuating means connecting with said cut-off valve and operating upon the accumulation of a predetermined pressure in said pressure tank to open the said cut-oft valve, said valve actuating means being adjustable to operate at various pressures.

In testimony whereof I affix my signature.

MACK P. ERI-IAN. 

